package com.yiren.manager.ctrl;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

/**
 * 图片验证码
 * @author yanwenhao
 *
 */
@RequestMapping("captcha")
@Controller
public class CaptchaController {
	
	@Autowired
	private Producer captchaProducer;
	
    @RequestMapping("getCaptchaImage")
    public ModelAndView getCaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {
        HttpSession session = request.getSession();
        System.out.println("getCaptchaImage");
        response.setDateHeader("Expires", 0);

        // Set standard HTTP/1.1 no-cache headers.  
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");

        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).  
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");

        // Set standard HTTP/1.0 no-cache header.  
        response.setHeader("Pragma", "no-cache");

        // return a jpeg  
        response.setContentType("image/jpeg");

        // create the text for the image  
        String capText = captchaProducer.createText();

        // store the text in the session  
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
        
        String code = (String)session.getAttribute(Constants.KAPTCHA_SESSION_KEY);  
        System.out.println("******************验证码是: " + code + "******************"); 

        System.out.println("capText="+capText);
        // create the image with the text  
        BufferedImage bi = captchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();

        // write the data out  
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
        return null;
    }
}
